LOANS (Past Due Financing Receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Gross loans	$ 1,589,475	$ 1,614,595
Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	1,533,051	1,504,275
Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	1,144	1,978
Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	1,589	12,144
31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	175
61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	189	4
90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	1,400	11,965
Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	1,530,318	1,490,153
Commercial real estate
Financing Receivable, Impaired [Line Items]
Gross loans	1,088,636	1,049,147
Commercial real estate | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	1,088,636	1,049,147
Commercial real estate | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	1,144	1,572
Commercial real estate | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	759	11,428
Commercial real estate | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial real estate | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial real estate | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	759	11,428
Commercial real estate | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	1,086,733	1,036,147
Residential first mortgages
Financing Receivable, Impaired [Line Items]
Gross loans	96,835	133,779
Residential first mortgages | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	96,835	133,779
Residential first mortgages | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0	0
Residential first mortgages | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	182	335
Residential first mortgages | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Residential first mortgages | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Residential first mortgages | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	182	335
Residential first mortgages | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	96,653	133,444
Residential rentals
Financing Receivable, Impaired [Line Items]
Gross loans	172,082	139,059
Residential rentals | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	172,082	139,059
Residential rentals | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0	0
Residential rentals | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	446	0
Residential rentals | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Residential rentals | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	189	0
Residential rentals | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	257	0
Residential rentals | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	171,636	139,059
Construction and land development
Financing Receivable, Impaired [Line Items]
Gross loans	37,139	37,520
Construction and land development | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	37,139	37,520
Construction and land development | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0	0
Construction and land development | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Construction and land development | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Construction and land development | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Construction and land development | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Construction and land development | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	37,139	37,520
Home equity and second mortgages | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	26,518	29,129
Home equity and second mortgages | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0	406
Home equity and second mortgages | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	202	369
Home equity and second mortgages | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	167
Home equity and second mortgages | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Home equity and second mortgages | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	202	202
Home equity and second mortgages | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	26,316	28,354
Commercial loans
Financing Receivable, Impaired [Line Items]
Gross loans	48,327	52,921
Commercial loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	48,327	52,921
Commercial loans | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0	0
Commercial loans | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial loans | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial loans | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial loans | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial loans | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	48,327	52,921
Consumer loans
Financing Receivable, Impaired [Line Items]
Gross loans	2,168	1,027
Consumer loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	2,168	1,027
Consumer loans | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0	0
Consumer loans | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	8
Consumer loans | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	8
Consumer loans | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Consumer loans | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Consumer loans | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	2,168	1,019
Commercial equipment
Financing Receivable, Impaired [Line Items]
Gross loans	61,346	61,693
Commercial equipment | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	61,346	61,693
Commercial equipment | Purchased credit impaired | Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0	0
Commercial equipment | Total Past Due | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	4
Commercial equipment | 31-60 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial equipment | 61-89 Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	4
Commercial equipment | 90 or Greater Days | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
Commercial equipment | Current | All Other Loans | Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	61,346	61,689
U.S. SBA PPP Loans
Financing Receivable, Impaired [Line Items]
Gross loans	56,424	110,320
U.S. SBA PPP Loans | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	56,424	110,320
PCI Loans		0
U.S. SBA PPP Loans | Purchased credit impaired | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
PCI Loans	0
U.S. SBA PPP Loans | Total Past Due | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
U.S. SBA PPP Loans | 31-60 Days | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
U.S. SBA PPP Loans | 61-89 Days | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
U.S. SBA PPP Loans | 90 or Greater Days | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	0	0
U.S. SBA PPP Loans | Current | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans		$ 110,320
U.S. SBA PPP Loans | Current | All Other Loans | Non Portfolio Loans
Financing Receivable, Impaired [Line Items]
Gross loans	$ 56,424